flammable liquids, how vapor pressure affects the volatility of a liquid, chemistry homework help

Question 12

This is a two-part question: 

Part 1: Methanol and toluene are flammable liquids whose vapor pressures at 68ºF (20ºC) are 96 and 22 mmHg, respectively. Based solely on this data, determine which compound poses the greater risk of fire and explosion at 68ºF (20ºC). Explain your choice. In general, discuss how vapor pressure affects the volatility of a liquid?

Part 2: If the liquid in Part 1 is transferred into a container for transportation, why does DOT require that the container not be filled to the brim? Discuss your answer. 

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